Direction Question

I had my headphones on while walking back to work from lunch, and a young woman waved me down and started talking. I took my headphones off and she asked, "Which way is Hudson Street?" She was not a native English speaker. I considered the question for a moment while trying to remember, and then I pointed the way. "It's that way, two or three blocks." She nodded, "Okay, thank you." And then she walked in the exact opposite direction. Even if she didn't understand the words, it was very clear which way I was pointing. Perhaps her friends told her to go in the opposite direction of Hudson to find them, or maybe she was taking an English course and assigned to spend some real world time getting directions. Regardless, I walked down Hudson St a few times today and did not see her.